Photo-litho



A UNITED STATES PATENT OFFICE.

THOS. JAS. SLOAN, OF NEW YORK, N. Y.

TAILORS SHEARS.

Sltoeciilcaton` of Letters Patent No. 2,787, dated September 23, 1842.

To all whom t may concern Be it known that I, THOMAS JAMES SLoAN, of thecity, county, and State of New York, have invented a new and usefulImprovement in Tailors Shears; and I hereby declare that the followingis a full, clear, and exact description thereof, reference being had tothe accompanying drawings, making a partof this specification, in which-Figure l, is a sideview; Fig. 2, upper side of the upper bow with bladeattached; Fig. 3,'under side of under bow with blade and swivel afliXed;Fig. 1, inside view of lower blade and upper bo-w showing the socketjoint.

The nature of my invention consists in adapt-ing the upper bow to thethumb so that it shall have a more equal bearing than shears now in use;and in constructing the lower bow so as to swivel as the fingers openand shut `the joint being so formed as to prevent the edges of theshears from shaving each other.

In the formation of the upper bow of these shears the upper section ofthe bow (a.) is made slanting so as to present the hole through itnearly on a line parallel with the blades the lower section (b) beingflattened out so as to present a surface somewhat shaped to the insideof the thumb which extends down onto the shank; at the termination ofthe flattened part, the shank (c) is turned to the left at an angle ofabout l5? with the blade, which it joins at a point on a line with theinside of the bow, the blade is formed similar to those now in use; thisform of bow, allows the thumb to take a natural position and rest itswhole length from the ball to the end upon the lower section of the bow,and the shank and prevents `the edges of the blades from spreadingapart. The lower bow (o) is shaped similar to those now in use, and isattached tothe shank in the following way, the shank (0^) is bentoutward to correspond with that of the opposite blade; from the pointwhere the bow would ordinarily join it a curved piece is bent forward,and then curves around under the place of the bow, and up behind, likethe lower half of a bow, of a pair of common shears; from the end of theshank where the curved piece (d) is joined, a point projects, which fitsinto a socket on the upper section of the bow (d) the other end of thebow is sustained, by a screw which passes through the curve (d) and onthese it swivels, as the fingers open and shut in the act of cutting.

The blades are jointed together in the following way, the upper bladehas a projection (e) (see Fig. 3) in form of a circular disk, which fitsinto a concavity (see Fig. 4) of the other blade; the inside of theprojection (c) is turned out leaving a circular ring around the holethrough which the screw passes; in the concavity a similar ring (f) isleft projecting from the bottom thereof, which rubs against that on' theother blade thereby presenting an equal and steady` surface for theblades to turn on, with the least possible friction, and preventingtheir wearing by cutting over onto each other.

What I claim as my invention and desire to secure by Letters Patentis- 1. The so forming the upper bow, and crooking the shank of shears,,that the thumb can have a bearing its whole length upon the lowersection (o) parallel to the blades in the manner herein described.

2. I also claim the construction of the lower bow (e) so `as to swivelin the shank, having a rest under it (CZ) in the manner and for thepurpose above set forth.

3. I further claim the forming a steady fulcrum for the` blades of theshears by means of a socket joint, bearing upon the bow rings (e and f)constructed and arranged as before specified.

TI-IOS. JAS. SLOAN.

)Witnesses GEORGE R. WEST, PLATT MERWILL,

